Exercise bicycle frame



FIG. 1 is a right side view of an exercise bicycle frame.

FIG. 2 is a left side view of an exercise bicycle frame.

FIG. 3 is a rear view of an exercise bicycle frame.

FIG. 4 is a front view of an exercise bicycle frame.

FIG. 5 is a bottom view of an exercise bicycle frame.

FIG. 6 is a top view of an exercise bicycle frame; and,

FIG. 7 is a left rear perspective view of an exercise bicycle frame.

The broken lines illustrate portions of the exercise bicycle frame which form no part of the claimed design. 

CLAIM The ornamental design for the exercise bicycle frame, as shown and described. 